NumberResearchRecent thousands-block assignments
4 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, last 30 days — NPA 603
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2026-09-04 | 603-420-5XXX | 5000–5999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | MERRIMACK | NH |
| 2026-09-01 | 603-857-5XXX | 5000–5999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | SUNCOOK | NH |
| 2026-08-25 | 603-505-3XXX | 3000–3999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | DERRY | NH |
| 2026-08-25 | 603-732-4XXX | 4000–4999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | MILFORD | NH |
| 2026-08-18 | 603-824-0XXX | 0000–0999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | SALEM | NH |
| 2026-08-13 | 603-805-5XXX | 5000–5999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | CONCORD | NH |
| 2026-08-13 | 603-857-4XXX | 4000–4999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | SUNCOOK | NH |
| 2026-08-11 | 603-265-3XXX | 3000–3999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | NEW BOSTON | NH |
| 2026-08-11 | 603-377-9XXX | 9000–9999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | MERRIMACK | NH |
| 2026-08-11 | 603-467-9XXX | 9000–9999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | MANCHESTER | NH |
| 2026-08-11 | 603-833-4XXX | 4000–4999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | ROCHESTER | NH |
| 2026-06-26 | 603-487-4XXX | 4000–4999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | NEW BOSTON | NH |
| 2026-06-26 | 603-857-3XXX | 3000–3999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | SUNCOOK | NH |
| 2026-06-12 | 603-467-8XXX | 8000–8999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | MANCHESTER | NH |
| 2026-06-12 | 603-670-7XXX | 7000–7999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | MERRIMACK | NH |
| 2026-04-10 | 603-257-8XXX | 8000–8999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | PLAISTOW | NH |
| 2026-04-10 | 603-702-7XXX | 7000–7999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | KINGSTON | NH |
| 2026-04-10 | 603-974-8XXX | 8000–8999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | PLAISTOW | NH |
| 2026-04-06 | 603-340-9XXX | 9000–9999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | SUNCOOK | NH |
| 2026-02-25 | 603-327-3XXX | 3000–3999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | SALEM | NH |
| 2026-02-25 | 603-351-4XXX | 4000–4999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | GOFFSTOWN | NH |
| 2026-02-25 | 603-472-0XXX | 0000–0999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | BEDFORD | NH |
| 2026-02-25 | 603-916-3XXX | 3000–3999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | MEREDITH | NH |
| 2026-02-18 | 603-420-3XXX | 3000–3999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | MERRIMACK | NH |
| 2026-02-18 | 603-718-7XXX | 7000–7999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | NASHUA | NH |
| 2026-01-05 | 603-325-6XXX | 6000–6999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | NEW BOSTON | NH |
| 2026-01-05 | 603-513-4XXX | 4000–4999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | CONCORD | NH |
| 2026-01-05 | 603-587-4XXX | 4000–4999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | CANDIA | NH |
| 2026-01-05 | 603-857-2XXX | 2000–2999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | SUNCOOK | NH |
| 2026-01-05 | 603-901-4XXX | 4000–4999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | CONWAY | NH |
| 2025-12-29 | 603-580-0XXX | 0000–0999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | EXETER | NH |
| 2025-12-16 | 603-571-6XXX | 6000–6999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | DERRY | NH |
| 2025-12-04 | 603-702-9XXX | 9000–9999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | KINGSTON | NH |
| 2025-11-17 | 603-804-2XXX | 2000–2999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | DOVER | NH |
| 2025-10-24 | 603-884-6XXX | 6000–6999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | NASHUA | NH |
| 2025-08-28 | 603-481-5XXX | 5000–5999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | PLYMOUTH | NH |
| 2025-08-28 | 603-571-3XXX | 3000–3999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | DERRY | NH |
| 2025-08-19 | 603-928-1XXX | 1000–1999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | SUNCOOK | NH |
| 2025-08-13 | 603-815-7XXX | 7000–7999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | DURHAM | NH |
| 2025-04-17 | 603-202-6XXX | 6000–6999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | CONCORD | NH |
| 2025-04-17 | 603-395-4XXX | 4000–4999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | EXETER | NH |
| 2025-04-16 | 603-265-5XXX | 5000–5999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | NEW BOSTON | NH |
| 2025-04-11 | 603-571-9XXX | 9000–9999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | DERRY | NH |
| 2025-04-01 | 603-416-7XXX | 7000–7999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | RAYMOND | NH |
| 2025-04-01 | 603-732-5XXX | 5000–5999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | MILFORD | NH |
| 2025-04-01 | 603-794-8XXX | 8000–8999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | LACONIA | NH |
| 2025-03-17 | 603-426-6XXX | 6000–6999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | DERRY | NH |
| 2025-02-10 | 603-453-5XXX | 5000–5999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | HAMPSTEAD | NH |
| 2025-02-06 | 603-426-3XXX | 3000–3999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | DERRY | NH |
| 2025-01-28 | 603-751-4XXX | 4000–4999 | Assigned | BELL ATLANTIC MOBILE, INC | 6386 | PELHAM | NH |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.